Description: This mini sound amplifier will offer you precise sound amplification. Very simple to handle, convenient for daily use and travel use. Come and have a try. Features: Noise reduction function, which is great for eliminating background noise and providing you the best sound quality. Reliable quality, made of user-friendly material, flexible, safe to use without harming ear canal. It has 4 pieces of earplugs in different sizes, fits your ear well, very nice to wear. Easy to operate, USB rechargeable, enjoy your new life with this lovely stuff. Not easy to slip off, very comfortable to wear for a long time. Specifications: Type: Hearing Aid Model: A1 Material: Silica Gel, ABS Color: Khaki Battery: Lithium Battery Max. Sound Output: 1305dB Sound Gain: 38 5dB Total Harmonic Wave Distortion: 30dB Frequency Range: 300~4000Hz Input Noise: 30dB Voltage: DC 3.7V Working Current: 4mA Package Size: Approx. 16.4 * 11.6 * 3.4cm / 6.46 * 4.57 * 1.34in Package Weight: Approx. 184g / 6.49oz Note: Please read the user manual carefully before use. Package List: 1 * Hearing Aid 1 * USB Charging Cable 1 * EU Adapter 4 * Earplugs 1 * English User Manual